Vertical water-tube boiler.



l. E. BELL.

VERTICAL WATER THEE BOILER.

APELICATION man IULY 2|, x915.

Patented May 21, 1918.

3 SHEETS-SHEET I.

J. E. BELL.

. VERTICAL WATER TUBE BO LER. APPLICATION FILED JULY 21, 1915.

I a SHEETS-SHEET 3.

INVENTOR Patented May 21, 1918.

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JOHN E. BELL, ornnw YORK, n. Y.

VERTICAL WATER-TUBE BOILER.

To all whom it ma concern:

Be it known that I, Joan E. BELL a citizen of the United States,- residingat New York, in the county of New York and State of New York, have invented a new and useful Vertical Water Tube Boiler, of

which the following is a full, clear, and exact description, reference beingv had to the accompanying drawings, forming part of this specification, in which- Figure 1 is asectional side elevation showing one form of my improved boiler.

g. 1 is a detail sectional view' on the line 1-1 of Fig. 1.

' brick which I prefer to employ.

My invention relates to that. class of vertical water tube boilers wherein an upper transverse steam and water drum is conneeted to a lower transverse mud drum by water tubes which are divided into sets with bafiiing between. The baffling directs the I gases in a serial up and down flow among the tubes. V

The object of the invention is to improve the economy and efiiciency of such" boilers and also to provide improved soot blowers, and improve the baffling; as well as the furnace structure thereof, particularly where gaseous fuel is used. In the drawings, 2 represents an upper transverse steam and water drum, and 3a corresponding mud drum, these drums belng connected by water tubes which are shown as bent in the present form, although they may be straight, if desired, and connected to tube seats or upset portions of the drums. The tubes are shown as divided into four sets by means of a front baflle 4, a middle baflie 5, and a rear baths 6 interposed be tween the tubes. The front baflie 4 and the rear bafiie 6 are preferably made of ,special tile, which are arranged between the tubes forming a row at the front portion 'of the entire set of tubes. I have shown these tiles 7 as interposed between the tubes of the second row from the front and partially surrounding these tubes, while leav- Specificationof Letters Patent. Patented May 21, 1918.

Application filed July 21, 1915. Serial No. 41,089. I

ing the front and rear portions of the tubes exposed. The front portion ofthe second row of tubes is exposed to the gases in their pass upward from the furnace chamber 8, while the rear portions of these same tubes are exposed to the gases in their second and downward pass in frontof the bafile 5.

' These specialbaflles 4.. and 6 are preferably formed 'of special tile such as shown in FigS.'4 to 7 inclusive, each tile being made in halves with a space between them for receiving refractory plastic. material 9.

This provision allows for unequal spacing between the tubes of-the row, which usually occurs, and also provides for expansion and contraction under heat. To fit any particular case, the tiles, if not of the proper size, jean be chipped somewhat. They mayalso be spaced somewhat by-the filling 9. The side block of the row, shown at- 10, may

enter a recess in a' refractory side block 11, i

which recess also contains the refractory loose or plastic material .12. InFig. 5 T show a perspective view of the block 11 Fig. 6 showing a similar view of the bloclr 10;

while Fig. 7 shows a view of one of the intermediate tile blocks. 1 The middle baflie .5 is preferably a substantial wall of refractory brick carried on the lower transverse T-heam Support 13, and

extending therefrom up to the upper drum. Within this wall-are preferably built the deflector tiles 14, which as shown are in.-

clilied in the direction of flow pf the gases. By this inclinatlon these'defiector t les serve to direct the ases into the heating surface without matemal obstruction of the flow.

The back baflie 6 is preferably placed near the rear of thetubes, it being shown between the tubes of the second row from the rear. The furnace setting is preferably built so that'the front wall portion 15 is adjacent" to the front row of tubes, it being shown as stepped inwardly from the Wall 16 of the combustion chamber 8 to bring it nearer to the tubes. Similarly the rear setting wall 17 is arranged close to the rear row of tubes. The front wall 15 will becomehighly heated by the flame and gases, thus subjecting the front tubes to radiant heat, and increasing the capacity and economy of the boiler. The

arrangement of the front and rear walls in connection with the front and rear baflies causes the gases to sweep oyer the walls at I a high velocity. The walls will, on this ac.- count, absorb heat rapidly fromthe gases,

, and w ill be elevated in temperature until radiated to the tubes.

I through the wall acts in the same way. Ar-

ranging the baffling as shown consequently makes the front and rear walls act as a por-- tion of the boiler heat absorbing surface.

The front Wall preferably has a lining 18 of firebrick, between which and the outer wall 19 of common brick is preferably provided an intermediate layer 20 of high heat resistingor insulating material, such as :brick made from diatomaceous earth. The

' same is also preferably the case-with the wall. 16. By this construction, while the wall becomes very hot on its inner face,

' comparatively little heat will be lost through conduction.v

Theboiler proper isipreferably supported from the upper drum. This upper drum being carried on the structural iron work and, in turn, supporting the tubes and the .tower drum. The middle wall or baflle 5 can, therefore, be 'carried'from the setting walls and can .be built up gas-tight to the upper drum without-causing trouble from expansioni or contraction.

' as I provide at 22 and 23, there has been 1 preferably connect the covering 21 of the upper drum with the front and rear walls by arches. 22 and 28, which will better conform to the natural flow lines of the ga'ses, preventing pocketing of the gases, and will be more substantialand less liable .l-"Jto' become injured.

40 I through this arch and between the arch and I As shown in Fig. '1, a hole may be made the side wall through which tubes may be removed and replaced. This hole may be covered bya suitable tile 24. Heretofore, in boilers of thistype, instead of arches such a flat top wall consisting of bricks supportred on T-irons, .and which is removed in tak- 1 ing out and putting in tubes.

This isa very light and flimsy construction, and also gives large" losses by heat radiation and by the cooling effect due to infiltration of air. These objections are avoided by theprovision of the arches, having an opening or.

openings through which the tubes can be inserted and removed.

A In"-'conne'ction with the middle wall or- ,baffie' Ipreferably provide soot blowers 25, which maybe built into the wall solidly.

' nection, because this baflle wall and the side. wallsv form aconnectcd structure. If, how.

Y ever, this baffle is supported from the boiler, ,th'e'fiexible joint should be used for the soot without any expansion joint or flexible conblower connections. -These soot blowers comprise the transverse pipes 25 built into the wall, each having a series of nozzles 26 which discharge in. opposite directions among the tubes. These nozzles are preferablyinclined in the direction of the gaseous flow to assist the draft.

Inthe form shown, a aseous mixture of gas and air is fed through the supply channels 27. and 28 into the common chamber 29,

between whichand the chamber 8 is provided a series of partition walls 30, as shown in Fig. 2, which split up the mixture into a series of streams. This gives an even distribution of 'the mixture throughout the width of theboiler and aids in securing complete combustion. It also aids in mixing the air and gas.

- The advantages of my invention result from the type of bafiling used, the special arrangement of the setting, the character of tiles used in the special baflies, the soot blower combination, etc.

The number of tubes may be varied, the type' of baflle bricks may be changed, and many other changes may be madegvithout departing from my invention as covered by the claims.

I claim:

-1. A vertical Water tube boiler, consistin of a transverse steam and water drum am atransverse mud drum, rows of water tubes connecting said .drums, a central bafile extending from the steam and water drum to a point above the mud drum, and a second baffle in front of the first baflie supported on the mud drum and held in position by i the tubes in one of the rows of tubes in front of. the central scribed. I

2. A vertical watertube boiler, comprisiug a transverse steam and water drum, a

bafiie; substantially as detransverse mud drum, rowsof water tubes connectin said drums, there being one set of tubes in front of thestructure and the other in the rear of the structure, a central bafiie between the two sets of tubes extending from the steam and water drum to a point above the mud. drum, a front baflie supported by the tubes in one row of the front set andextending to a point below the steam and water drum, a third baffle supported by the mud drum and held inposition by the tubes of the rear set, said rear bafile extending to a point adjacent to the steam and water drum; substantially as described.

3. A vertical water tube boiler, consisting .of a single transverse steam and water drum afsingle transverse mud drum, two sets of water tubes connecting the steam and water drum1to the mud drum, each set-comprising a'plurality of rows of tubes, a central bafilc between the two sets of tubesextending from the steam and water drum to a point above v.i'the mud drum, a support for the lower end 130 of said baffle a front bafile suploorted on the the steam and water druin in order to promud drum and held in position by the tubes vide two up asses and two down passes for in the second row of the front'set, said baflie the gases; substantially as described. extending from the mud drum to a point In testimony whereof, I have hereunto set '5 adjacent to the steamand Water drum, and my hand.

JOHN E. BELL.

a second bafile supported on the muddrum and held in position by the tubes forming Witnesses;

next to the last row of tubes in the back set, ELIZABETH ARMSTRONG, said bafiie extending to a point adjacent to F. FALLA. 

